tl;dr—A treaty that credibly banned “whatever weapons might end humanity” and enforced by the Japanese (or at least the Japanese national tax authority) would, I think, have a strong chance of achieving the desired objective.
tl;dr—A treaty that credibly banned “whatever weapons might end humanity” and enforced by the Japanese (or at least the Japanese national tax authority) would, I think, have a strong chance of achieving the desired objective.